projects / OpenSPARC-T2-SAM / blame
| Commit | Line | Data |
|---|---|---|
| 920dae64 AT |
1 | /* Weak references objects for Python. */ |
| 2 | ||
| 3 | #ifndef Py_WEAKREFOBJECT_H | |
| 4 | #define Py_WEAKREFOBJECT_H | |
| 5 | #ifdef __cplusplus | |
| 6 | extern "C" { | |
| 7 | #endif | |
| 8 | ||
| 9 | ||
| 10 | typedef struct _PyWeakReference PyWeakReference; | |
| 11 | ||
| 12 | /* PyWeakReference is the base struct for the Python ReferenceType, ProxyType, | |
| 13 | * and CallableProxyType. | |
| 14 | */ | |
| 15 | struct _PyWeakReference { | |
| 16 | PyObject_HEAD | |
| 17 | ||
| 18 | /* The object to which this is a weak reference, or Py_None if none. | |
| 19 | * Note that this is a stealth reference: wr_object's refcount is | |
| 20 | * not incremented to reflect this pointer. | |
| 21 | */ | |
| 22 | PyObject *wr_object; | |
| 23 | ||
| 24 | /* A callable to invoke when wr_object dies, or NULL if none. */ | |
| 25 | PyObject *wr_callback; | |
| 26 | ||
| 27 | /* A cache for wr_object's hash code. As usual for hashes, this is -1 | |
| 28 | * if the hash code isn't known yet. | |
| 29 | */ | |
| 30 | long hash; | |
| 31 | ||
| 32 | /* If wr_object is weakly referenced, wr_object has a doubly-linked NULL- | |
| 33 | * terminated list of weak references to it. These are the list pointers. | |
| 34 | * If wr_object goes away, wr_object is set to Py_None, and these pointers | |
| 35 | * have no meaning then. | |
| 36 | */ | |
| 37 | PyWeakReference *wr_prev; | |
| 38 | PyWeakReference *wr_next; | |
| 39 | }; | |
| 40 | ||
| 41 | PyAPI_DATA(PyTypeObject) _PyWeakref_RefType; | |
| 42 | PyAPI_DATA(PyTypeObject) _PyWeakref_ProxyType; | |
| 43 | PyAPI_DATA(PyTypeObject) _PyWeakref_CallableProxyType; | |
| 44 | ||
| 45 | #define PyWeakref_CheckRef(op) PyObject_TypeCheck(op, &_PyWeakref_RefType) | |
| 46 | #define PyWeakref_CheckRefExact(op) \ | |
| 47 | ((op)->ob_type == &_PyWeakref_RefType) | |
| 48 | #define PyWeakref_CheckProxy(op) \ | |
| 49 | (((op)->ob_type == &_PyWeakref_ProxyType) || \ | |
| 50 | ((op)->ob_type == &_PyWeakref_CallableProxyType)) | |
| 51 | ||
| 52 | /* This macro calls PyWeakref_CheckRef() last since that can involve a | |
| 53 | function call; this makes it more likely that the function call | |
| 54 | will be avoided. */ | |
| 55 | #define PyWeakref_Check(op) \ | |
| 56 | (PyWeakref_CheckRef(op) || PyWeakref_CheckProxy(op)) | |
| 57 | ||
| 58 | ||
| 59 | PyAPI_FUNC(PyObject *) PyWeakref_NewRef(PyObject *ob, | |
| 60 | PyObject *callback); | |
| 61 | PyAPI_FUNC(PyObject *) PyWeakref_NewProxy(PyObject *ob, | |
| 62 | PyObject *callback); | |
| 63 | PyAPI_FUNC(PyObject *) PyWeakref_GetObject(PyObject *ref); | |
| 64 | ||
| 65 | PyAPI_FUNC(long) _PyWeakref_GetWeakrefCount(PyWeakReference *head); | |
| 66 | ||
| 67 | PyAPI_FUNC(void) _PyWeakref_ClearRef(PyWeakReference *self); | |
| 68 | ||
| 69 | #define PyWeakref_GET_OBJECT(ref) (((PyWeakReference *)(ref))->wr_object) | |
| 70 | ||
| 71 | ||
| 72 | #ifdef __cplusplus | |
| 73 | } | |
| 74 | #endif | |
| 75 | #endif /* !Py_WEAKREFOBJECT_H */ |